Car-underframe.



W. 1. BOA.

CAR UNDERFRAME.

APPLICATION FILED FEB. 5. I916.

Patented MayL19l7.

I IV VENTOR VVLLLJAM J- 130A 1, Now/s PErrRs w Puovo LIIHU WILLIAM 3'. BOA, OF ST. LOUIS, MISSOURI, ASSIGNOB T0 AMERICAN CAR AND FOUNDRY COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY.

CAR-UNDERFRAME.

Specification of Iletters Patent.

Patented May 1, 1917.

Application filed February 5, 1916. Serial No. 76,372.

To all whom it may concern:

Be it known that 1, WILLIAM J. RoA, residing at St. Louis, Missouri, and being a citizen of the United States, have invented certain new and useful Improvements in Car-Underframes, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that variousmodifications thereof will occur to persons skilled in the art.

In said drawings:

Figure l is a plan view of a portion of a car underframe including the invention hereinafter described.

Fig. 2 is a vertical sectional view, the section being taken on line 2-2 of Fig; 1.

Figs. 3, 4 and 5 are transverse sectional views, the sections being taken on lines 33, 4-4 and 55, respectively, of Fig. 1, Figs. 3 and 4 being combined and the left hand portion representing the view on line 33 between the bolster and end sill, while the right hand portion represents the view on line 44 intermediate the bolsters.

Fig. 6 is an enlarged, detached plan view of the connection casting hereinafter described, and

Fig. 7 is a transverse sectional view similar to Fig. 5, but showing a modified form of metal reinforcing sills for the wood center sills.

The object of the invention is to provide a car underframe of composite type, including therein old wood sill elements present in wood cars now in service but the original underframes of which cars it is essential to strengthen in order that they may resist the increased buffing shocks due to present service conditions.

Such bufling shocks cause failure of many wood draft andcenter sills between the bolsters of the car and the end sills while the remainder of the sills between the bolsters is generally sound enough to continue in service, and it is one of the objects of the present invention to replace the relatively worthless parts of such underframes and retain for use thesound portions in conjunction with continuous connected metallic members so cooperating with theremaining portion of the wood sills as to utilize both Wood and metal to resist bufling stresses.

In Fig. 1, there is represented a portion of an end sill l and a corresponding portion of a bolster 2, either of which may be of any material or design. Extended at right angles to this and longitudinally of the car underframe are represented wood center sill portions which extend from b0l- 'ster to bolster, it being understood, of course, that the bolster and end sills,etc;, are duplicated at the opposite end of the car.

The forward part of the wood sills is cut away at the bolsters, as shown in Fig. l, and for the portion cut away, the channelshaped draft sills 4 are substituted. The latter extend from a short distance in front of the bolster to the end sill. The usual draft lugs 5, such, for example, as are illus trated in Elliss Patent 1,042,416 of October 29, 1912, may be and are shown riveted to "this channel, said lugs 5 having follower Lapping the rear of the draft sill 4 and extended to the corresponding sill at the opposite end of the car at each side of the center line is a. reinforcing channel sill 6 which latter has its flanges inwardly disposed, a, 6., toward the center line of the car while the flanges of the draft sills are outwardly disposed so as to present opposing plane web faces between which is interposed the connection casting 7 which is designed to transfer the shock sustained by the draft lug 5 and draft sill 4 to the wood sills 3 and the auxiliary metal sills 6 connected therewith as heretofore pointed out. Said casting 7, as shown in Fig. l, is spaced somewhat rearwardly from the innermost follower stops 5 of the draft lugs 5.

' To efiiect this transference of the stresses due to bufling to the channel sill 6, rivets 8 pass through the web 9 and the bosses 10 of said casting 7, and through the adjacent webs of sills 4 and 6 respectively, which rest in surface contact with said connection casting.

' The connection casting is provided with shoulders 11 and 12 which extend laterally from the main body portion of said casting 7 as shown in Fig. 6, and as shown inFig. 1, these shoulders are adapted to perform a useful function in the distribution of buffing stresses from the channel draft sill to the composite wood and metal sill 8-6, as follows:

The shoulder 11 is of a height corresponding approximately with the depth of the channel draft sill 4, and the parts are so juxtaposed that the rear end of the draft sill is in contact with said shoulder 11 and, due to the rigidity of connection between the sills l and 6 afore referred to, buffing stresses transmitted to the sill 4: through the lugs 5 will be transferred for that portion thereof not absorbed by the draft gear through the shoulder 11 to channel 6 and wood member 3 of the composite center sill, the channel 6 and wood member 3 being connected as hereinafter described.

Supplemental to the shoulder 11 is a shoulder 12 of relatively large area upon its rear face. The rear face of the shoulder 12 is intended to rest in surface contact with the end portion of the wood sill 3, thus forming a draft abutment for the utilization of said sill 3 to resist bufling stresses.

The immediately preceding description of a single draft sill 4, channel sill 6 and wood sill 3, applies to both center sill members at each end of the car.

Extending transversely of and secured by direct rivet connection to the lower flanges 6 of the channel sill 6 is a bottom cover plate 14; which is approximately co-extensive with the length of the wood sills 3 and may be as wide as the distance between the outer faces of said sills or may be of a less width, but should be of sufiicient width to permit a direct connection of the sills 3 with the bottom cover plate 14: by means of long bolts 15, as shown in the sectional view, Fig. 5. v

The object of the bottom cover plate and the bolted connection of the sills 3 therewith, is to unite the wood sill members 3 with the auxiliary channel sill member 6 throughout the length of the wood sills whereby the Wood sills and channel sills will mutually stiffen each other to resist bufling stresses and to carry the superimposed load. This cooperation could not very well be secured without an intimate connection of the wood sills and auxiliary channels 6, and I have taken advantage of the necessity for this requirement to provide means for supporting the wood sills throughout their length, thereby very materially stiflening them to resist service stresses.

The object of the bottom cover plate being to support the old wood sill members and said plate extending laterally from the metallic auxiliary reinforcing channel sill member 6, it is evident that should 2 sections 6-6 be substituted for the channels 6-6 with the bottom flanges of the Zs extending outwardly the same result in less degree would be accomplished, but, as commercially rolled Z sections having flanges of 1. In combination, a bolster, spaced center sill members having bottom flanges, a bottom cover plate connected to said flanges and outstanding laterally from said sill members, and wood center sills resting on and being bolted to the outstanding portions of said bottom cover plate, said wood sills having their major portions positioned below the top of said bolster.

2. In combination, a bolster, Wood center sills, spaced center sill membershaving bottom flanges, a bottom cover plate connected to said flanges and outstanding laterally from said sill members to support said wood sills, draft sills lapping and secured to the end portions of said flanged sill members and an oflset casting interposed between said draft sills and sill members and extending into alined abutment with said wood center sills within and so as to derive underlying support from said bolster at their abutting terminals.

3. In combination, a bolster, draft sills, spaced wood sill members and metal center sill members the latter having bottom flanges, a bottom cover plate connected to said flanges and outstanding laterally therefrom the wood center sills resting on the outstanding portions of said bottom cover plate, said cover plate passing through said bolster and being connected to said draft sills.

4. In combination, spaced wood center sill members, auxiliary reinforcing sill members, a bottom cover plate connected to the reinforcing members and outstanding 1aterally therefrom to support said wood sill members, draft sills secured to end portions of'said reinforcing sill members, draft lugs mounted on said draft sills and provided withv draft gear follower stops, and a shouldered casting spaced from the follower stops and interposed between said draft sills and the other sill members and adapted to transfer bufling shocks from the draft sills to all of the other sill members.

5. In combination, a bolster, spaced center sill members having bottom flanges, a bottom cover plate extending laterally from said sill members, wood center sills resting on and being bolted to the outstanding portions of said bottom cover plate, draft sills secured to said flanged sill members and connec-. tion castings extending into alinement with said wood sills and between said other sill members, said cover plate passing through said bolster and being connected to said draft sills.

6. In combination, wood center sills, spaced center sill members having bottom flanges, a bottom cover plate connected to said flanges and outstanding laterally from said sill members, to support said Wood sills, draft sills secured to the end portions of said flanged sill members and an offset casting lapping the said draft sills and flanged sill members and having continuous longitudinal engagement With the rear vertical edges of said draft sills and With adjacent borders of said draft sill side faces and also extending into alinement With said Wood center sills.

7. In combination, a bolster, spaced metallic center sill members having a bottom cover plate connected to said sill members and outstanding laterally therefrom, Wood Qepies center sills resting on and being bolted to the outstanding portions of said bottom cover plate and terminating intermediate the Width of said bolster, draft sills and means for connecting the draft sills to the metallic sill members and extending in alinement with the ends of the Wood center sills at the bolster.

In Witness whereof I have hereunto. set my hand in the presence of tWo Witnesses.

WILLIAM J. ROA. Witnesses:

OSCAR HooHBERG, WILLIAM V. MORRISON.

or this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0. 

